Information processing apparatus and method, information recording medium, and computer program

Abstract

An information processing apparatus includes a data processor configured to obtain first content stored in a first information recording medium and second content which is stored in a second information recording medium and which is usable together with the first content, and to perform content playback processing by using the first content and the second content. The data processor calculates a hash value of a certificate stored in the first information recording medium, and verifies the calculated hash value against a hash value stored in a content certificate corresponding to the first content, and on the condition that the calculated hash value and the hash value stored in the content certificate coincide with each other, the data processor performs the content playback processing by using the first content and the second content.

1. An information recording storage medium comprising:
 encrypted content; 
 a public key certificate; and 
 a content certificate in which certificate data that certifies the integrity of the encrypted content and a hash value of the public key certificate are stored, 
 wherein identification information is stored in a first file in a first directory of the information recording storage medium, 
 wherein the content certificate is stored in the first directory, 
 wherein the information recording storage medium comprises a second directory accessible using a virtual file system, 
 wherein the first directory is not accessible using the virtual file system, and 
 wherein the identification information is stored in the first file in a same directory in which the content certificate is stored. 
 
     
     
       2. The information recording storage medium according to  claim 1 , wherein the content certificate stores a hash value based on data forming the encrypted content. 
     
     
       3. The information recording storage medium according to  claim 1 , wherein the identification information comprises information concerning a production entity of the encrypted content and a disc ID, which serves as identification information concerning the information recording medium, and wherein the first directory is not included when the virtual file system is constructed. 
     
     
       4. The information recording storage medium according to  claim 1 , wherein the public key certificate stores therein a public key for verifying a signature set in the encrypted content.